2.4.1.234: kaempferol 3-O-galactosyltransferase
This is an abbreviated version!
For detailed information about kaempferol 3-O-galactosyltransferase, go to the full flat file.
Word Map on EC 2.4.1.234
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2.4.1.234
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petunia
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pollen
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flavonols
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maize
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hybrida
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pollen-specific
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aglycone
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glycosyltransferases
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plant-specific
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quercetin
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3-o-glucosyltransferase
- 2.4.1.234
- petunia
- pollen
- flavonols
- maize
- hybrida
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pollen-specific
-
aglycone
- glycosyltransferases
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plant-specific
- quercetin
- 3-o-glucosyltransferase
Reaction
Synonyms
F3GalT, F3GalTase, F3GaT, flavonoid 3-O-galactosyltransferase, flavonol 3-O-galactosyltransferase, galactosyltransferase, uridine diphosphogalactose-flavonol 3-O-, UCGalT1, UDP-galactose:cyanidin 3-O-galactosyltransferase, UDP-galactose:flavonoid 3-O-galactosyltransferase, UDP-galactose:flavonol 3-O-galactosyltransferase, UDPgalactose-flavonoid-3-O-glycosyltransferase, uridine diphosphogalactose-flavonol 3-O-galactosyltransferase
ECTree
2.4.1.234 kaempferol 3-O-galactosyltransferaseAdvanced search results
results (
results (Substrates Products
Substrates Products on EC 2.4.1.234 - kaempferol 3-O-galactosyltransferase
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SUBSTRATE 
PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
UDP + kaempferol 3-O-beta-D-galactoside
UDP-alpha-D-galactose + kaempferol
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-
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r
UDP-alpha-D-galactose + cyanidin
UDP + cyanidin 3-O-beta-D-galactoside
reaction of EC 2.4.1.294
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-
?
UDP-alpha-D-galactose + kaempferol
UDP + kaempferol 3-O-beta-D-galactoside
53% of the activity compared to cyanidin
-
-
?
UDP-alpha-D-galactose + peonidin
UDP + peonidin 3-O-beta-D-galactoside
26% of the activity compared to cyanidin
-
-
?
UDP-alpha-D-galactose + quercetin
UDP + quercetin 3-O-beta-D-galactoside
25% of the activity compared to cyanidin
-
-
?
UDP-D-galactose + isorhamnetin
UDP + isorhamnetin 3-O-beta-D-galactoside
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kaempferol, isorhamnetin and quercetin are the best substrates, F3GaT transfers a galactosyl residue exclusively to the 3-hydroxyl group of the substrate, 106% of the activity with kaempferol as substrate
-
-
?
UDP-D-galactose + kaempferol
UDP + kaempferol 3-O-beta-D-galactoside
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kaempferol, isorhamnetin and quercetin are the best substrates, F3GaT transfers a galactosyl residue exclusively to the 3-hydroxyl group of the substrate
trifolin
-
?
UDP-D-galactose + kaempferol 4'-monomethylether
UDP + kaempferol 4'-monomethylether 3-O-beta-D-galactoside
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79% of the activity with kaempferol as substrate
-
-
?
UDP-D-galactose + myricetin
UDP + myricetin 3-O-beta-D-galactoside
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28% of the activity with kaempferol as substrate
-
-
?
UDP-D-galactose + quercetin 7-O-glucoside
UDP + quercetin 7-O-glucoside-3-O-beta-D-galactoside
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33% of the activity with kaempferol as substrate
-
-
?
UDP-D-galactose + rhamnetin
UDP + rhamnetin 3-O-beta-D-galactoside
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75% of the activity with kaempferol as substrate
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-
?
UDP-galactose + 2-(3-benzoylphenyl)-3,5,7-trihydroxychromen-4-one
UDP + 2-(3-benzoylphenyl)-3,5,7-trihydroxychromen-4-one galactoside
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20-30% of the activity with kaempferol as substrate
-
-
?
UDP-galactose + fisetin
UDP + fisetin 3-O-beta-D-galactoside
23.3% of the activity with kaempferol as substrate
-
-
r
UDP-galactose + galangin
UDP + galangin 3-O-beta-D-galactoside
15.1% of the activity with kaempferol as substrate
-
-
r
UDP-galactose + isorhamnetin
UDP + isorhamnetin 3-O-beta-D-galactoside
13% of the activity with kaempferol as substrate
-
-
r
UDP-galactose + kaempferide
UDP + kaempferide 3-O-beta-D-galactoside
-
-
-
r
UDP-galactose + myricetin
UDP + myricetin 3-O-beta-D-galactoside
23.4% of the activity with kaempferol as substrate
-
-
r
UDP-galactose + rhamnetin
UDP + rhamnetin 3-O-beta-D-galactoside
6.9% of the activity with kaempferol as substrate
-
-
r
UDP-D-galactose + quercetin
UDP + quercetin 3-O-beta-D-galactoside
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role in pollen germination
quercetin 3-O-beta-D-galactoside induces pollen germination via the reverse activity
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r
UDP-D-galactose + quercetin
UDP + quercetin 3-O-beta-D-galactoside
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kaempferol, isorhamnetin and quercetin are the best substrates, F3GaT transfers a galactosyl residue exclusively to the 3-hydroxyl group of the substrate, 104% of the activity with kaempferol as substrate
-
-
?
UDP-galactose + flavonol
UDP + flavonol 3-O-beta-D-galactoside
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F3GalTase controls the formation of glycosylated flavonols in pollen, enzyme also catalzes the reverse reaction, i.e the production of flavonol aglycone from the galactoside and UDP, and has therefore the potential to control the level of the bioactive flavonol species and as a result, pollen germination, the direction of the reaction could be controlled in vivo by localized hydronium ion changes, control mechanisms of the reversible reaction
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r
UDP-galactose + flavonol
UDP + flavonol 3-O-beta-D-galactoside
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absolute requirement for UDP-galactose
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r
UDP-galactose + flavonol
UDP + flavonol 3-O-beta-D-galactoside
F3GalTase controls the formation of a pollen-specific class of glycosylated flavonols, role in flavonol-induced pollen germination, F3GalTase is expressed exclusively in the male gametophyte, where it modifies a molecule required for functional pollen
-
-
?
UDP-galactose + flavonol
UDP + flavonol 3-O-beta-D-galactoside
F3GalTase uses only UDP-galactose and flavonols to catalyze the formation of flavonol 3-O-galactosides, F3GalTase catalyzes the reverse reaction, generation of flavonols from UDP and flavonol 3-O-galactosides, almost as efficiently as the forward reaction
-
-
r
UDP-galactose + flavonol
UDP + flavonol 3-O-beta-D-galactoside
highly specific for flavonols and UDP-galactose
-
-
?
UDP-galactose + flavonol
UDP + flavonol 3-O-beta-D-galactoside
F3GalTase controls the formation of a pollen-specific class of glycosylated flavonols, role in flavonol-induced pollen germination, F3GalTase is expressed exclusively in the male gametophyte, where it modifies a molecule required for functional pollen
-
-
?
UDP-galactose + flavonol
UDP + flavonol 3-O-beta-D-galactoside
F3GalTase uses only UDP-galactose and flavonols to catalyze the formation of flavonol 3-O-galactosides, F3GalTase catalyzes the reverse reaction, generation of flavonols from UDP and flavonol 3-O-galactosides, almost as efficiently as the forward reaction
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-
r
UDP-galactose + flavonol
UDP + flavonol 3-O-beta-D-galactoside
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-
-
-
?
UDP-galactose + kaempferol
UDP + kaempferol 3-O-beta-D-galactoside
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role in pollen germination, F3GalTase is a gametophyte-specific enzyme, that controls the accumulation of glycosylated flavonols in pollen
endogenous product in pollen, which stimulates pollen germination
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r
UDP-galactose + kaempferol
UDP + kaempferol 3-O-beta-D-galactoside
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role in pollen germination, the direction of the reaction could be controlled in vivo by localized hydronium ion changes
kaempferol 3-O-beta-D-galactoside induces pollen germination via the reverse activity
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r
UDP-galactose + kaempferol
UDP + kaempferol 3-O-beta-D-galactoside
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F3GalTase is a highly discriminating and efficient enzyme
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-
r
UDP-galactose + kaempferol
UDP + kaempferol 3-O-beta-D-galactoside
-
-
-
?
UDP-galactose + kaempferol
UDP + kaempferol 3-O-beta-D-galactoside
-
-
-
r
UDP-galactose + kaempferol
UDP + kaempferol 3-O-beta-D-galactoside
-
-
-
r
UDP-galactose + quercetin
UDP + quercetin 3-O-beta-D-galactoside
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role in pollen germination, F3GalTase is a gametophyte-specific enzyme, that controls the accumulation of glycosylated flavonols in pollen
endogenous product in pollen, which stimulates pollen germination
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r
UDP-galactose + quercetin
UDP + quercetin 3-O-beta-D-galactoside
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F3GalTase is a highly discriminating and efficient enzyme
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r
UDP-galactose + quercetin
UDP + quercetin 3-O-beta-D-galactoside
-
-
-
?
UDP-galactose + quercetin
UDP + quercetin 3-O-beta-D-galactoside
-
-
-
r
UDP-galactose + quercetin
UDP + quercetin 3-O-beta-D-galactoside
-
-
-
r
additional information
?
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F3GalTase glycosylates the flavonols required for pollen germination, F3galtase gene regulation
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-
?
additional information
?
-
-
F3GalTase glycosylates the flavonols required for pollen germination, F3galtase gene regulation
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-
?
additional information
?
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not: apigenin, naringenin, dihydroquercetin, pelargonidin, delphinidin, cyanidin, NAD+, ferrulic acid, sinapic acid, naphthylphthamic acid, gibberillic acid, indole acetic acid, abscisic acid, jasmonic acid, not in the reverse direction: kaempferol 3-O-glucoside, quercetin 3-O-glucoside
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-
?
additional information
?
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not: apigenin, naringenin, dihydroquercetin, pelargonidin, delphinidin, cyanidin, NAD+, ferrulic acid, sinapic acid, naphthylphthamic acid, gibberillic acid, indole acetic acid, abscisic acid, jasmonic acid, not in the reverse direction: kaempferol 3-O-glucoside, quercetin 3-O-glucoside
-
-
?
additional information
?
-
not: apigenin, naringenin, dihydroquercetin, pelargonidin, delphinidin, cyanidin, NAD+, ferrulic acid, sinapic acid, naphthylphthamic acid, gibberillic acid, indole acetic acid, abscisic acid, jasmonic acid, not in the reverse direction: kaempferol 3-O-glucoside, quercetin 3-O-glucoside
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-
?
additional information
?
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no/poor substrates: kaempferol 5,7,4-trimethylether, quercetin 5-monomethylether, kaempferol 3-O-galactoside, kaempferol 7-O-glucoside, kaempferol 7-O-rhamnoside, dihydrokaempferol, dihydroquercetin, eriodictyol
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-
?
